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<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>4课堂测验</title>
  <style>
    .hot>a {
      color: red;
    }
  </style>
</head>

<body>
  <div class="hot">
    <a href="#">大肘子</a>
    <ul>
      <li><a href="#">猪头</a></li>
      <li><a href="#">猪尾巴</li>
    </ul>
  </div>

</body>

</html>